US1586021A

US1586021A - Cutter chain

Info

Publication number: US1586021A
Application number: US720733A
Authority: US
Inventors: Zellers John William
Original assignee: Goodman Manufacturing Co LP
Current assignee: Goodman Manufacturing Co LP
Priority date: 1924-06-18
Filing date: 1924-06-18
Publication date: 1926-05-25
Anticipated expiration: 1943-05-25

Description

May 25 5 1926.

J. W. ZELLERS CUTTER CHAIN Filed June 18, 1924 Patented May 25, 192%.

uiresraras JOHN .VILLIAM ZELLERS, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOODMAN MANUFAC- TUBING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CUTTER CHAIN.

Application filed June 18, 1924. Serial No. 720,733.

This invention relates to improvements in cutter chains for mining machines and has for its principal object to provide a simply and durably constructed chain block.

The invention may be best understood by reference to the accompanying drawings, in which Figure 1 is a side view of the chain block with the cutter bit in place therein;

Figure 2 is a perspective. view of the chain block and the cutter bit;

Figure 3 is an end view of the chain showing it inposition in the cutter head of a mining machine, the head being indicated in dotted lines; and

Figure 4 is a sectional view taken on line 4-41 of Figure 1.

In these drawings, which illustrate one form in which my invention may be embodied, achain block 1 is adapted to be pivotally connected to another block by a series of

straps

2, 2. The chain in use is an endless chain driven by a sprocket and working in a grooved cutter head 3 (see Figure 3). The blocks and straps are provided with restraining lips 5, 5 and 6, 6, to retain them in the guideways 7, 7 of the grooved cutter head. The blocks are provided with

cutter bits

8, 8. The cutter chain is made up of a series of chain blocks extending at various angles to the grooved cutter head, as shown in Figure 3. For the purpose of illustrating my device I have shown in detail one of such chain blocks having its cutter bit centrally located, that is to say, perpendicular to the grooved cutter head, but it will be understood that the same features of construction are used in the other chain blocks having varying degrees of inclination to said cutter head.

The bit 8 is preferably made of fiat bar stock, the central portion 9 having a substantially uniform rectangular cross-section and with its opposite ends forming the

cutting points

10, 10, inclined with the front or cutting face extending in an obtuse angle with respect to the adjacent front face of the central portion 9. The shape of the extreme ends of the cutter bit may be varied, depending upon the working conditions to which they are put. In the form shown a pick point is provided.

In order to secure a bit of the shape shown and described the cutter block is provided with a bit-receiving aperture 11 having an opening 12 of rectangular shape providing a working groove for the bit when held in place as shown in Figure 1. The lower portion of the aperture however is widened in longitudinal section so as to accommodate the lower inclined portion of the. bit. In the form shown the bit i'eceiving aperture is provided with a front wall 18 which may be substantially at a right angle to the longitudinal axis of the bit and a rear wall 14 which is inclined slightly rearwardly and inwardly from the outer face of the. bit so as to provide an inclined bearing surface for the rear face of the. bit. The front wall 13 and the rear wall 14 therefore diverge inwardly to provide suitable enlargement for the forwardly inclined cutting portion 10, as clearly shown in dotted lines in Figure 1. The bit is secured in place by means of a set screw 16 extending through the front face of the bit block preferably inclined substantially at right angles to the bearing surface 141 against which the cutter bit is engaged. The bottom of the aperture may be provided with a communieating passage 17 which may be desirable for supporting the bit aperture core in cases where the block is cast.

The block and bit construction as above described affords a simple and durable device in which the cutter bit having double cutting ends and especially these cutting ends inclined forwardly in the main body of the bit may be securely clamped in place in the block. The bit is maintained in engagement with a solid bearing surface along the rear face which is particularly desirable in cutter chains of this character, and said bit projects from the cutter block at a forwardly inclined angle. A

Although I have illustrated and described one form in which my invention may be embodied, it will be understood that the construction and arrangement of the various parts may be altered without departing from the spirit and scope of the invention. Furthermore, I do not Wish to be understood as limiting myself to .the particular construction shown, excepting as it may be defined in the appended claims.

I claim as my invention:

1. A chain block for mining machines having a bit provided with a central portion substantially uniform in cross-section and provided with offset cutting portions at opposite ends thereof, said chain block being provided with a bit-receiving aperture having its outer margins adapted to conform substantially with the cross-section area of said centre portion of the bit and having its inner portion enlarged in crosssection to receive the offset portion of the bit, and means for securing said cutter bit in said aperture.

2. A chain block for mining machines having bit provided with a central portion substantially uniform in cross-section and provided with otl'set cutting portions at opposite ends thereof, said chain block being provided with a bitreceiving aperture the front and rear walls whereof diverge inwardly, and means for securing said cutter bit in said aperture.

3.1; chain block for mining machines having a bit provided with a central portion substantially uniform in cross-section and provided With offset cutting portions at opposite ends thereof, said chain block being provided with a bit-receiving aperture having a substantially perpendicular front wall and an inwardly and rearwardly inclining rear wall, and means for securing said cutter bit in said aperture.

4:. A chain block for mining machines having a bit provided with a central P01 tion substantially unlform in cross-section and provided with offset cutting portions at opposite ends thereof, said chain blorl; being provided with a bit-receiving aperture the front and rear walls whereof li-- verge inwardly, and a set screw at right angles to the centre portion of said cutter bit for securing the latter in said aperture.

5. A chain block for mining machines having a bit provided with a central portion substantially uniform in cross-section and provided with offset cuttiig portion; at opposite ends thereof, said chain block being provided with a bit-receiving aperture, the forward wall whereof is substantially at right angles with the upper margin of the block and the rearward wall diverging rearwardly and inwardly, and a set screw for securing said cutter bit extending through said front wall and substantially at right angles with the rear wall of said aperture.

Signed at Chicago, county of Cook and State of Illinois, this 2nd day of June, A. D. 1924:.

JOHN WM. ZELLERS.